Compositions: ceramic – Ceramic compositions – Pore-forming
Patent
1998-03-30
1999-08-10
Marcheschi, Michael
Compositions: ceramic
Ceramic compositions
Pore-forming
501125, 501127, 501128, 501 17, 501 21, 501 32, 210496, 21050025, 21050026, 2105101, B01D 2400
Patent
active
059358874
ABSTRACT:
A ceramic filter for filtering molten metals includes aggregate particles consisting of fused alumina and/or sintered alumina, and a binder material, wherein the binder is present in an amount of 10 to 22 parts, by weight, per 100 parts of the aggregate particles. The binder material consists of 15 to 25%, by weight, of Al.sub.2 O.sub.3, 35 to 52% of B.sub.2 O.sub.3, not less than 7% and less than 15% of Sio.sub.2, and the balance of MgO. The ceramic filter may be prepared by kneading 100 parts of aggregate particles consisting essentially of either or both of fused alumina and sintered alumina, 10 to 22 parts of the foregoing binder material, an appropriate amount of an organic binder and an appropriate amount of water; molding the resulting mixture; drying the molded mixture; and then firing the same at a temperature ranging from 1150 to 1300.degree. C.
REFERENCES:
patent: 3524548 (1970-08-01), McDonald et al.
patent: 3939079 (1976-02-01), Uchiyama et al.
patent: 5114882 (1992-05-01), Sugiyama et al.
patent: 5145806 (1992-09-01), Shirakawa et al.
patent: 5152893 (1992-10-01), Shiraishi et al.
patent: 5667685 (1997-09-01), Yoshida et al.
Okuzono Nobuhiro
Sudo Eiichi
Marcheschi Michael
Mitsui Mining and Smelting Co. Ltd.
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